LDAP Authentication Provider customized to get username for every attempt

MyCustomAuthenticationProvider.java

package br.com.project.auth;

import org.apache.commons.lang3.Validate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.ldap.authentication.LdapAuthenticationProvider;
import org.springframework.security.ldap.authentication.LdapAuthenticator;
import org.springframework.security.ldap.userdetails.LdapAuthoritiesPopulator;
import org.springframework.stereotype.Controller;

@Controller
@Scope("request")
public class MyCustomAuthenticationProvider extends LdapAuthenticationProvider {

	private final Logger log = LoggerFactory
		.getLogger(MyCustomAuthenticationProvider.class);

	public MyCustomAuthenticationProvider(LdapAuthenticator authenticator,
			LdapAuthoritiesPopulator authoritiesPopulator) {
		super(authenticator, authoritiesPopulator);
	}
	
	@Override
	public Authentication authenticate(Authentication authentication)
			throws AuthenticationException {

		Validate.notEmpty(authentication.getName());
		Validate.notNull(authentication.getCredentials());
		Validate.notEmpty(authentication.getCredentials().toString());

		String username = authentication.getName();
		
		log.info("=========================> User {} is trying to login.", username);
		
		Authentication userAuthenticated = super.authenticate(authentication);

		return userAuthenticated;
	}
	
	@Override
	public boolean supports(Class<?> authentication) {
		return authentication.equals(UsernamePasswordAuthenticationToken.class);
	}
	
}